Portable baby seat or similar article



FIG. 1 is a right side perspective view of a portable baby seat or similar article showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a back view thereof; and

FIG. 5 is a bottom view thereof. 

The ornamental design for a portable baby seat or similar article, as shown and described. 